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Fractal Structure of A Porous Cross-Linked Polymer Resin and Dynamical Behavior of Adsorbed Solvents

Published online by Cambridge University Press:  03 September 2012

J.-P. Korb  and
C. Chachaty
J.-P. Korb
Affiliation:
Laboratoire de Physique de la Matière Condensée, C.N.R.S., Ecole Polytechnique, 91128 Palaiseau, France
C. Chachaty
Affiliation:
C.E.N. de SACLAY, DSM/DRECAM/SCM, 91191 Gif sur Yvette, France
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Abstract

The fractal distribution of pore sizes in a poly-4-vinylpyridine resin cross-linked by diamagnetic (Cd2+) or paramagnetic (VO2+, Cu2+) divalent metallic ions has been characterized by small-angle-X-ray scattering, nuclear paramagnetic relaxation and proton-pulsed-field gradient. These complementary techniques show a continuity in the fractal distribution of pore sizes through the same surface fractal dimension, Df = 2.6, over four orders of magnitude between 3 nm to 50 μm. Electron spin resonance yields a direct estimate of the overall fraction of solvent into the adsorption shell of the cross-linked polymer network as well as the dynamics and local viscosity of the solvent in this disordered material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 367: Symposium P – Fractal Aspects of Materials , 1994 , 215
Copyright
Copyright © Materials Research Society 1995

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